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2. N. G. Dubinin, Diffusion Chromizing of Alloys [in Russian], Izd. Mashinostroenie, 1954.
3. A. N. Minkevich, Chemico-Thermal Treatment of Metals and Alloys [in Russian], Izd. Mashinostroenie, 1965.
4. V. B. Dalisov, V. I. Pokhmurskii, and G. V. Karpenko, FKhMM [Soviet Materials Science], no. 2, 1967.
5. Author's Certificate No. 188818.